Riveting-machine.



No. 758,263. 'PATENTED APR 26, 1904.

' M. 0. MAGIIADQ.

RIVBTIN G MACHINE.

APPLICATION FILED MAY 22 1902.

30 MODEL.

UNITED STATES Patented April. 26, 1904.

PATENT OFFICE.

RlVETlNG-IVIACHINE.

SIPECIFICATION forming part of Letters Patent No. 758,263, dated April 26, 1904, k

Application filed MayZZ, 1902. Serial No.- l08,518. (N0 model.)

To all whom/it ntcty concern:

Be it known that I, MANUEL C. MAOHADO, a citizen of the United States, residing at Morro, in the county of San Luis Obispo and State of California, have invented a new and useful Riveting-Machine, of which the following is a specification.

The present invention'relates to improvements in riveting-machines, and is especially designed to facilitate the riveting of keeperloops to harness-straps, although capable of any character of leather-riveting.

It is, furthermore, designed to provide for holding keeper-loops to the part to which they are to be attached during the riveting operation and also to maintain the same in proper relation with respect to the plunger and the anvil of the machine.

Another object resides in having the workholder adjustable with respect to the plunger of the machine so as to accommodate for different thicknesses of leather and also to arrange the die upon the work holder so as to be adjustable therewith, and thereby accommodated to the different lengths of rivets.

Another object is to provide'for turning the rivet so as to give a screw action thereto,

and thereby facilitate the thrust of the rivet through the leather.

A final object is to embody the invention in the form of an attachment for application to a hand riveting-machine without materially altering the same and at the same time increasing the efficiency thereofQ With these and other objects in view the present invention consists in the combination and arrangement of parts, as will be hereinafter more fully described, shown in the acview of a hand riveting-machine embodying the present invention. Fig. 2 is a sectional view taken inthe plane of the plunger and showing a strap and keeper-loop applied thereto in position to be riveted. Fig.3 .is a detail perspective view of the work-holder.

Like characters of reference designate corresponding parts in all the figures of the drawlugs.

Referring to the accompanying drawings, 1 designates the body of the riveting-machine, which is substantially U-shaped, so as to provide the upper and lower substantially parallel arms 2 and 3, respectively. From the outer end of the lower arm there depends a sleeve or tubular bearing 4, and from the outer end of the upper arm rises a corresponding sleeve or tubular bearing 5, the bores of which are alined. Each of these hearings is internally the outer marginal edge of which is beveled inwardly, so as to receive the tapered upper end 0 of the section 6, whereby the frictional engagement between the two plunger-sections will be sufiicient to rotate the upper section 8 for a purpose as will be hereinafter described.

The upper end of the plunger-section 8 is provided with a socket or recess d. i l

Within the upper bearing 5 there is provided a screw-threaded stem or shank 9, which is provided at its outer end with a head or 5 finger-piece 10 for convenienceinadjusting the stem in an endwise direction through the bearing. This stem carries the work-holder, which is in the form of an arm 11, substantially parallel to the stem and provided with 9 an upper laterally-directed terminal bearing projection 12, which is provided with a perforation for the reception; of the upper portion of the stem, whereby the latter may be rotated independently of the work-holder.

The opposite lower end of the work-holder is provided with a pair of laterally-projected jaws 18, to the upper of which the lower end of the stem is swiveled, preferablyby means of a tapered projection e, fitting in a tapered I00 This plunger is preferably made 7 lower or outer face with a depression or seat 14, in the center of which is a projection 15, which is of conical shape.

At the rear end of the U-shaped body there is provided an integral solid lateral extension 19, which is provided at its outer end with an engaging face and which projects above orbeyond the arm 2, so as to form a hammer-head 20 for use in hammering rivets into a piece of leather and, in fact, in the capacity of a hammer for any purpose whatsoever. 7

1n employing the present device for securing a keeper-loop to a harness-strap,v as indioated in Fig. 2 of the drawings, the strap 16 and the overlapped portions of the looped keeper 17 are placed between the lower end of the work-holder and the plunger, with the intermediate portion of the keeper received in the seat or opening between the jaws 13, a rivet 18 having been previously fitted in the rivet-seat formed by the upper end of the bear,

ing-sleeve for the plunger. It will of course be understood that the holder is adjusted toward or away from the plunger by means of the endwise-adjustable stem 9, so as to accommodate the holder to the thickness of the leather, after which the plunger is operated to force the rivet through the strap and the overlapped portions of the looped keeper, whereby the end of the rivet enters the seat or depression in the anvil and is offset by engagement with said seat and the central projection 15. It will be noted that the head of the rivet overlaps the edges of the socket (Z in the upper end of the. plunger-section 8, whereby the hard edges of the socket will bite into the comparatively soft head of the rivet, and thereby turn the same with the plunger, whereby the rivet is screwed through the leather strap instead of merely being forced therethrough, thus materially facilitating the setting of the rivet through the leather. As soon as the upper end of the rivet strikes the jaw 13 and begins to be upset both the rivet and theplunger-section 8 will thereby be held against rotation, so as not to interfere with the upsetting of the rivet.

From the foregoing description it will be noted that the work-holder is conveniently adjustable toward and away from the plunger, so as to accommodate for the diflferent thicknessesof straps and keeper-loops, and the holder is swiveled or pivotally connected to the'adjustable stem, so as to obviate a swinging movement of the holder during the rotatable movement required to adjust the stem. Moreover, by reason of this pivotal mounting of the holder upon the stem the former may be swung to opposite sides of the'device, so that it may be conveniently used in either hand. To provide for convenience in applying and the finger-piece 10 may not be loosened when it is operated to feed the shank 9 downwardly. When the finger-piece has been removed,there is suflieient 'looseness between the arm 11 and the shank 9 to permit of the former being easily removed from the latter, and then the shank may be removed from the bearing 5.

A very important feature of the present invention resides in the peculiar proportion of the work-holder 11, whereby it is impossible for the seat 14 and the projection 15 to come in contact with the plunger-section 8 and the lower arm 3, as such engagement of parts would soon result in damage to the seat and projection. To bring about this feature, the work-holder 11 is constructed to have'the length from the under side of the arm 12 to the lower side of the holder slightly less than the distance between the top of the'arm or bearing 5' and the top of the lower arm 3, whereby when the holder has been adjusted downwardly until its arm 12 strikes the top of the arm 5 the lower end of the holder will not quite reach the arm 8, and therefore it is impossible .for the seat 14 and projection 15 to contact with the case-hardened plungersection 8.

It will of course be understood that the combined plunger-sections are slightly longer than the part 1 in order that the rivet may be moved out of the bore of said part and into engagement with the anvil in order that it may be upset thereby.

What I claim is- 1. riveting-machine, having a plunger and a horizontally-movable work-holder which is longitudinally adjustable toward and away from the plunger and means for supporting the work-holder in its adjustment.

2. A riveting-machine, having aplunger and a rotatably-mounted work-holder which is adjustable toward and away from the plunger loo and is also capable of rotatable adjustment to swing to opposite sides of the machine.

5. A riveting-machine, having aplunger, a

screw-threaded adjusting-stem alined longitudinally with the plunger, and a work-holder embodying an arm having its outer end provided with a lateral projection which is swiveled to the outerend of the stem, and a pair of laterally-projected jaws carried at the opposite inner end of the body and forming the work-holder proper, the inner end of the stem being swiveled to the inner jaw, and theouter side of the outer jaw being provided with an anvil to cooperate with the plunger.

6. A riveting-machine comprising a substantially U-shaped body having its opposite ends provided with transverse interiorlyscrew-threaded and alined tubular bearings, a screw-threaded plunger working in one of the bearings and provided atits'outer end with a hand-wheel, a screw-threaded stem working inthe opposite bearing, and a work-holder embodying an arm lying substantially parallel with the stem, and provided with an outer lateral projection swiveled to the outer end of the stem, and a pair of holder-jaws projected laterally from the opposite end of the'body, the inner jaw being swiveled to the inner end of the stem, and the outer jaw having an anvil provided upon its outer side.

'7. In a riveting-machine, the combination with a frame, and a plunger, of an arm having a laterally-projecting perforated portion at one end and provided witha pair of laterally-projected jaws at the opposite end, the outer side of the outer jaw having an anvil formed thereon and being located opposite the plunger, and means connected with the frame and with the perforated portion for moving the arm toward and from the plunger, substantially as described.

8. A riveting-machine, having means for rotating the rivet during the riveting operation, and means for frictionally actuating the said means.

9. A riveting-machine having an endwisemovable and rotatable plunger provided with means for engaging a rivet to rotate the same, and means for frictionally actuating the said means, substantially as described.

10. A riveting-machine having an endwisemovable and rotatable plunger composed of separate sections, one of the sections being frictionally actuated and provided with a socket forming a rivet engaging portion adapted to be partially embedded in a rivet, whereby the rivet is interlocked with the frictionally-actuated section for simultaneous rotation therewith, substantially as described.

11. A riveting-machine having an endwisemovable and rotatable plunger provided in its outer end with a socket which is smaller in diameter than the diameter of the head of a rivet to form a rivet-engaging portion, and means for frictionally actuating the rivet-engaging portion of the plunger, substantially as described.

, operation.

gagement with the outer section topermit the latter to be heldagainst rotation during the upsetting of the rivet. v

13. In a riveting-machine, the combination with an anvil, of an endwise-movable and sectional rotatable plunger provided at'its outer end with means for engagement with a rivet, and also having a frictional engagement between the plunger-sections, whereby the outer plunger-section is capable of being held against rotation by the frictionalengagement-between the rivet and the anvil during the upsetting 14:. In a riveting-machine, the combination with an anvil, of an endwise-movable rotatable plunger formed in separate sections, one section being screw-threaded and provided with an operating device at one end and a tapered terminal at the other end, the. other plunger-section being smooth and provided in its outer end with a socket and at its inner end with a socket having inwardly-beveled edges-for frictional engagement with the tapered end of the screw-threaded section.

15. In a riveting-machine, thecombi'nation with a plunger, of a work-holder adjustable toward and away from the plunger and movable horizontally, and means for limiting the adjustment of the work-holder toward the plunger to prevent contact therewith.

16. In a riveting-machine, the combination with opposite-spaced members, one of which has a plunger, of a work-holder carried by the other member and adjustable toward and away from the plunger and movablelhorizontally, and also provided with a stop device forengagement with said other member for limiting the adjustment of the work-holder toward the plunger and to prevent contact therewith. V r

17. .In a riveting-machine, the combination with opposite members, one of which has a plunger, and the other is provided with a screwthreaded bearing, of a work-holder having a laterally-projected arm, and-a screw-threaded adjusting-stem swiveled upon the arm and working in the screw-threaded bearing, the distance between theinner side of the arm and the outer side of the work-holder being less than the distance between the outer end of the screw-threaded bearing and the plunger.

18. In a riveting-machine, the combination with a substantially U-shaped body, of a plunger transverselypiercing one side of the body, an adjustable screw-threaded stem piercing the other side of the body, and a work-holder having its outer end provided with an arm which is swiveledupon the adjusting-screw, and its inner end being provided with a pair than the distance between the first-mentioned member of the body and the outer side of the opposite portion of the body, whereby the arm forms a stop to prevent the work-holder from engaging the plunger.

19. In a riveting-machine, the combination with a support, of a plunger, an adjustable work-holder, a screw-threaded adjusting-stem mounted upon the body and carrying the workholder, and a removable finger-piece piercing a part of the work-holder and having a de. tachable engagement with the screw-threaded adjusting-stem.

20. In a riveting-machine, the combination with a support, of a plunger, an adjustable- Work-holder having a lateral arm, an adjustable screw-threaded stem, and a finger-piece having a smooth cylindrical portion piercing the arm'of the work-holder to form a swiveled connection therewith, with the outer end of the stem screw-threaded and entering a screwthreaded socket in the outer end of the screwthreaded adjusting-stem.

21. In a riveting machine, the combination with opposite members, of a plunger carried by one of the members and provided with a handle constructed to engage one side of the member to stop the plunger, a Work-holder carried by the other member and adjustable to- Ward andaway from the plunger, and means to stop the adjustment of the Work-holder before it contacts with the first-mentioned member. In testimony that I claim the foregoing as my own I have hereto aifixed my signature in the presence of two witnesses. MANUEL C. MACHADO. Witnesses:

H. H. CARPENTER, F. J. RODRIGUES. 

